Handle check_run completed webhook events (#383)

* Handle check_run completed webhook events

* 🐍🌚🤖 Formatted using `black`.

* Improve test coverage

* 🐍🌚🤖 Formatted using `black`.

Author: Mariatta

miss_islington/__main__.py

@@ -1,26 +1,23 @@
-import aiohttp
 import asyncio
 import os
 import sys
 import traceback
-import cachetools
 
+import aiohttp
+import cachetools
+import sentry_sdk
 from aiohttp import web
-
 from gidgethub import aiohttp as gh_aiohttp
-from gidgethub import routing
-from gidgethub import sansio
+from gidgethub import routing, sansio
 
+from . import backport_pr, check_run, delete_branch, status_change
 
-from . import backport_pr
-from . import delete_branch
-from . import status_change
-
-router = routing.Router(backport_pr.router, delete_branch.router, status_change.router)
+router = routing.Router(
+    backport_pr.router, delete_branch.router, status_change.router, check_run.router
+)
 
 cache = cachetools.LRUCache(maxsize=500)
 
-import sentry_sdk
 
 sentry_sdk.init(os.environ.get("SENTRY_DSN"))
 

miss_islington/check_run.py

@@ -0,0 +1,39 @@
+import re
+
+from gidgethub import routing
+
+from . import util
+from .status_change import check_ci_status_and_approval
+
+router = routing.Router()
+
+TITLE_RE = re.compile(r"\[(?P<branch>\d+\.\d+)\].+?(?P<pr>\d+)\)")
+AUTOMERGE_TRAILER = "Automerge-Triggered-By"
+
+
+@router.register("check_run", action="completed")
+async def check_run_completed(event, gh, *args, **kwargs):
+    """
+    A check run is completed event handler.
+    """
+    sha = event.data["check_run"]["head_sha"]
+
+    if event.data["sender"]["login"] == "miss-islington":
+        await check_ci_status_and_approval(gh, sha, leave_comment=True)
+    else:
+        pr_for_commit = await util.get_pr_for_commit(gh, sha)
+        if pr_for_commit:
+            pr_labels = pr_for_commit["labels"]
+            print("is auomer")
+            print(util.pr_is_automerge(pr_labels))
+            print(util.pr_is_awaiting_merge(pr_labels))
+            print("pr label")
+            print(pr_labels)
+            if util.pr_is_automerge(pr_labels) and util.pr_is_awaiting_merge(pr_labels):
+                await check_ci_status_and_approval(
+                    gh,
+                    sha,
+                    pr_for_commit=pr_for_commit,
+                    leave_comment=True,
+                    is_automerge=True,
+                )

miss_islington/status_change.py

@@ -135,6 +135,7 @@ async def check_ci_status_and_approval(
                         emoji = "✅"
                     else:
                         emoji = "❌"
+                    print("leaving a comment")
                     await util.leave_comment(
                         gh,
                         pr_number=pr_number,